4223523421 has 16 divisors (see below), whose sum is σ = 4765239808. Its totient is φ = 3716539200.

The previous prime is 4223523383. The next prime is 4223523427. The reversal of 4223523421 is 1243253224.

4223523421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4223523421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4223523421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223523427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51210 + ... + 105211.

It is an arithmetic number, because the mean of its divisors is an integer number (297827488).

Almost surely, 2^4223523421 is an apocalyptic number.

It is an amenable number.

4223523421 is a deficient number, since it is larger than the sum of its proper divisors (541716387).

4223523421 is a wasteful number, since it uses less digits than its factorization.

4223523421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156532.

The product of its digits is 11520, while the sum is 28.

The square root of 4223523421 is about 64988.6407074344. The cubic root of 4223523421 is about 1616.4352114507.

Adding to 4223523421 its reverse (1243253224), we get a palindrome (5466776645).

It can be divided in two parts, 42235 and 23421, that added together give a palindrome (65656).

The spelling of 4223523421 in words is "four billion, two hundred twenty-three million, five hundred twenty-three thousand, four hundred twenty-one".